Improvement of High-Resolution Satellite Rainfall Product for Typhoon Morakot (2009) over Taiwan
Improvement of High-Resolution Satellite Rainfall Product for Typhoon Morakot (2009) over Taiwan
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DOI：
10.1175/jhm-d-13-047.1
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发表时间：
2013-11
影响因子：
3.8
通讯作者：
Aina Taniguchi;S. Shige;M. Yamamoto;T. Mega;S. Kida;T. Kubota;M. Kachi;T. Ushio;K. Aonashi
中科院分区：
文献类型：
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作者：
Aina Taniguchi;S. Shige;M. Yamamoto;T. Mega;S. Kida;T. Kubota;M. Kachi;T. Ushio;K. Aonashi
作者通过使用地形/非地形降雨分类方案改进了2009年台湾莫拉克台风的高分辨率全球降水卫星制图（GSMaP）产品。为估计的地形强迫上升运动中使用的地形/非地形降雨分类方案，最佳的水平长度尺度平均海拔数据进行了检查，发现约为50公里。理论分析表明，随着大气在水平尺度上的不断上升，大气变得不稳定，对流发展，理论/非理论大气分类方案扩展到所有在轨被动微波辐射计的GSMaP算法，不仅包括微波成像仪，还包括一些微波探测器。将所得的降水率与红外图像相结合，用于高分辨率的降水产品，结果与雨量计观测结果吻合较好。
The authors improve the high-resolution Global Satellite Mapping of Precipitation (GSMaP) product for Typhoon Morakot (2009) over Taiwan by using an orographic/nonorographic rainfall classification scheme. For the estimation of the orographically forced upward motion used in the orographic/nonorographic rainfall classification scheme, the optimal horizontal length scale for averaging the elevation data is examined and found to be about 50km. It is inferred that as the air ascends en masse on the horizontal scale, it becomes unstableandconvectiondevelops.Theorographic/nonorographic rainfallclassification schemeis extendedto the GSMaP algorithm for all passive microwave radiometers in orbit, including not just microwave imagers butalsomicrowavesounders. Theretrievedrainfallrates,togetherwithinfraredimages,areusedforthehighresolution rainfall products, which leads to much better agreement with rain gauge observations.